Apple has released the source code for low-level system components of the operating system MacOS 15, codenamed “Sequoia”. The source code includes free software components from Darwin and other non-GUI related programs and libraries. A total of 171 packages with source code have been made available, with some packages from the MacOS 14.x branch, like crontabs, being removed.
One of the key components now accessible is the core kernel XNU, which has been released as code snippets related to the upcoming MacOS release. XNU is part of the Darwin open source project and is a hybrid kernel that combines the Mach core with components from FreeBSD and the C++ API IOKIT for driver development.
Furthermore, open components used in the mobile platform iOS 18.0 have also been published. This release includes two packages -webkit and libiconv.